求个正则

C# code

@"<img.*?src=[""'](.+?)[""'].*?>";

<img alt='11 ' src=0.jpg />
<img src='1.jpg' title='AA' alt='2 ' >
<img src="1ddd.jpg" title='IOO' alt='2233 ' >


src=没有单引号或双引号的情况，怎么匹配？


------解决方案--------------------
string str = @"<img alt='11 ' src=0.jpg />
<img src='1.jpg' title='AA' alt='2 ' >
<img src=""1ddd.jpg"" title='IOO' alt='2233 ' >";
var array = Regex.Matches(str, @"(?is)<img[\s\S]*?src=['""]?(?<src>[^'""\s]+)").Cast<Match>().Select(t => t.Groups["src"].Value).ToArray();

------解决方案--------------------
string pattern=@"(?i)<img\b[^>]*?src=(['""]?)(?<src>[^'""\s]+?)\1[^>]*?>";

C# code

string str = @"<img alt='11 ' src=0.jpg />
<img src='1.jpg' title='AA' alt='2 ' >
<img src=""1ddd.jpg"" title='IOO' alt='2233 ' >";
string pattern=@"(?i)<img\b[^>]*?src=(['""]?)(?<src>[^'""\s]+?)\1[^>]*?>";
if(Regex.IsMatch(str,pattern))//判断是否匹配
{
  //you do
}